| 摘要 |
<p>PURPOSE:To simplify the constitution of a transmission system in which analog values at plural information generation points need be collected to one place concurrently in terms of time, by omitting a sampling command station and a sampling command transmission line. CONSTITUTION:An RTu1 which is farthest from an MTu4 sends out a frame 8 for data transmission in every sampling synchronism of the system. Respective RTu1-RTu3 regared the reception timing of a synchronizing word SYN9 as sampling timing to perform A/D conversion and transmit the data to the MTu4 together with alloted slots. To time synchronizing words to sampling, dummy slots 13-14 corresponding to the data establishment time at the RTus are provided between the allotted slots and synchronizing words to the RTus1-3. Consequently, the RTus perform sampling at different timing because the synchronizing words are timed to the sampling. Thus, a device and a transmission dedicated to sampling commands are omitted, so the constitution of the system is simplified.</p> |
